GB861676A - Improvements relating to reinforced and prestressed concrete rafters - Google Patents

Improvements relating to reinforced and prestressed concrete rafters

Info

Publication number
GB861676A
GB861676A GB3405555A GB3405555A GB861676A GB 861676 A GB861676 A GB 861676A GB 3405555 A GB3405555 A GB 3405555A GB 3405555 A GB3405555 A GB 3405555A GB 861676 A GB861676 A GB 861676A
Authority
GB
United Kingdom
Prior art keywords
rafter
tie bar
bending moment
reinforced
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3405555A
Inventor
David Eurof Jones
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GWYLON ISAAC
Original Assignee
GWYLON ISAAC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GWYLON ISAAC filed Critical GWYLON ISAAC
Priority to GB3405555A priority Critical patent/GB861676A/en
Publication of GB861676A publication Critical patent/GB861676A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E04C3/205—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members with apertured web, e.g. frameworks, trusses
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21—Connections specially adapted therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

861,676. Reinforced concrete roof trusses. ISAAC, G. Feb. 28, 1957 [Nov. 28, 1955], No. 34055/55. Class 20(4) A joint between a lower end of an inclined reinforced or prestressed concrete rafter 11, Fig. 1, a tie bar 13 and a support for the rafter wherein the point of intersection P of the line of thrust T of the support with the axis of the tie bar is located below the extended neutral axis of the central part of the rafter, and in which the resultant of the forces exerted on the rafter 11 by the tie bar 13 and support exerts on the rafter a bending moment in the direction tending to bow the rafter upwardly between its ends thereby effecting reduction of the bending moment at the centre of the rafter. The rafter 11 may be part of a truss which may include a second rafter 12 meeting the rafter 11 in a ridge joint 16, which may comprise a resilient packing, and which is located below the intersection of the extended neutral axes of the central parts of the two rafters. The ridge joint also includes at least one tie bar 15 which may be secured by nuts and washers on its ends, Fig. 5 (not shown). The invention may also be applied to a northlight truss, Fig. 3, in which additional reduction of bending moment is effected by an extension 25 on the shorter rafter 25, substantially in line with the longer rafter 23. The tie bars 13, 26 are supported by hangers 14, 27 respectively.
GB3405555A 1955-11-28 1955-11-28 Improvements relating to reinforced and prestressed concrete rafters Expired GB861676A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3405555A GB861676A (en) 1955-11-28 1955-11-28 Improvements relating to reinforced and prestressed concrete rafters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3405555A GB861676A (en) 1955-11-28 1955-11-28 Improvements relating to reinforced and prestressed concrete rafters

Publications (1)

Publication Number Publication Date
GB861676A true GB861676A (en) 1961-02-22

Family

ID=10360802

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3405555A Expired GB861676A (en) 1955-11-28 1955-11-28 Improvements relating to reinforced and prestressed concrete rafters

Country Status (1)

Country Link
GB (1) GB861676A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601939A (en) * 1968-03-22 1971-08-31 Hugh Mary Clyne Means for connecting together relatively inclined reinforced concrete supporting members

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601939A (en) * 1968-03-22 1971-08-31 Hugh Mary Clyne Means for connecting together relatively inclined reinforced concrete supporting members

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